<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			* {
				margin: 0;
				padding: 0;
			}
			
			p {
				width: 100px;
				height: 100px;
				border: 1px solid red;
			}
			
			.da {
				width: 200px;
			}
			
			.lan {
				background-color: blue;
			}
		</style>
		<script type="text/javascript" src="js/jquery-1.11.1.min.js"></script>
		<script type="text/javascript">
			$(function(){
				$("input").click(function(){
//					$("p").html("<h3>呵呵</h3>"); //写了html标签，则会按标签语义执行
					alert( $("p").html() ); //不写参数，表示获取元素
				});
			});
		</script>
	</head>
	<body>
		<input type="button" id="btn1" value="点我" />
		<p>哈哈哈</p>
	</body>
</html>
